I am trying to rebuild my 3 foot 48 gallon reef w/ 50 pounds LR 20 years running. I had a power loss while on vacation last week and my tank sitters decided NOT to call me. YES we have a generator etc. anyway... I have done 2 water changes of 20 ish gallons each. I have removed all dead fish / BTA's / Xenia / More Xenia / mushrooms. Obviously I could not get all of the dead Xenia / mushrooms from the rocks... b/c they are so hard to pull off especially if tiny. It has been over a week with power back and tank running BUT my ammonia still reads toxic from the ammonia alert badge. What else do I need to do so the tank will cycle?? I pulled LR from my other reef to help seed the good bacteria? Still toxic on ammonia? How long will this last? Is this normal?